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SIGH, yes it is a pretty big difference. 320's are pretty weak, no offense!

There is a big difference in all the engines you named. First off, between the E90 and E46 330, pretty sure its an all together different engine model code.

Secondly, the difference between the 2 M52 engines is one has Dual Vanos, which is a noticeble difference!

I meant the e90 325 and e46 330.. they have the same horse power I was wondering if the engines were the same.

Yes its weak but as much as your making it out to be compared to a 323.......one I have a 320 and was going to buy a 99 323i last year, I test drove it and there is not much a difference when u step on the gas. Compared to a 325i, there is a difference but again minimal until you reach higher speeds. Theres a huge difference with the 330 and m3 though. And for some reason I thought Double Vanos technology came out in 2001 when they replaced the 323/328.

I meant the e90 325 and e46 330.. they have the same horse power I was wondering if the engines were the same.

Yes its weak but as much as your making it out to be compared to a 323.......one I have a 320 and was going to buy a 99 323i last year, I test drove it and there is not much a difference when u step on the gas. Compared to a 325i, there is a difference but again minimal until you reach higher speeds. Theres a huge difference with the 330 and m3 though. And for some reason I thought Double Vanos technology came out in 2001 when they replaced the 323/328.